Claims
- 1. A method for making a magnesium based metal matrix alloy composite article, said method comprising the steps of:
- (a) mixing and blending a magnesium based matrix alloy powder and a SiC particulate to achieve substantially uniform distribution of said particulate in said matrix alloy;
- (b) forming said mixture into a consolidated body by the application of heat and pressure in vacuum;
- (c) preheating and fabricating said consolidated body into an article by the application of heat and pressure.
- 2. A method of mixing and blending as recited in claim 7, wherein said powder and particulate are mixed by liquid suspension coprocessing, the suspending medium comprising distilled water having a pH ranging from about 8.5 to 11.5 and the agitation being effected by ultrasonification.
- 3. A method of mixing and blending as recited in claim 1, wherein said powder and particulate are mixed by ball milling a charge thereof, in a vacuum or protective environment, said charge having a weight ratio of powder to particulate ranging from 1:1 to 6:1.
- 4. A method as recited in claim 1, wherein said mixture is formed into a consolidated body at a consolidation temperature ranging from 250.degree. C. to 500.degree. C.
- 5. A method as recited in claim 1, wherein step (c) is carried out at a temperature ranging from 250.degree. C. to 500.degree. C.
- 6. A method as recited in claim 5, wherein said consolidated body is fabricated by extrusion at an extrusion ratio ranging from 8:1 to 22:1.
- 7. A method as recited in claim 5, wherein said consolidated body is fabricated by forging in a multi-step closed-die forging press adjusted to achieve 20% reduction in height for each step.
Parent Case Info
This application is a division, of application Ser. No. 07/650,134, filed Feb. 4, 1991
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4941918 |
Horikoshi et al. |
Jul 1990 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
650134 |
Feb 1991 |
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